Catapult

Thank you very much swansont and to others who have replied. I have one more question about your statement. For example my hand was in the center of the water when I submerge the object so meaning the submerged object will be in the center as well until some force change its position? Thank you very much. Any help will be appreciated.

Hello, Thank you for your answer. I read somewhere that the total density of ship is lower than water. So is that what you mean? Thank you for your answer. But for example, I submerge some object which has the same dense as water in a water. What is the position of that submerged object? Or it is like that, if I push upward the submerged object, then it will float and if I push it downward, it will sink? Thank you michael123456 and J.C.MacSwell as well for your replies. Any help will be appreciated.

Hello, I want to know more about buoyancy. How ship floats? We know that ship is much denser than water. Somebody had told me that it floats because it is open and therefore there are air on it and air is less denser than water. However, I don't know the formula on how to get the overall density if the air already involves. Would somebody give me the formula on how to get the overall density wherein air involves, like the overall density of ship? One more, So what does the above quoted statement means? Meaning the submerged object is in the center of the fluid? Any help will be greatly appreciated. Thank you.

Hello hypervalent_iodine, Thank you for your response. You're such a kind person. Thank you.

Hello hypervalent_iodine, Thank you for response. I am trying to make my hobby project using 10% acetic acid, zinc and copper. But I have problem with the acetic acid. Is this 10% acetic acid safe to experiment with? Any help will be greatly appreciated. Thank you.

Hello hypervalent_iodine, Thank you for your response. Good thing I have voltmeter. I heard also that a lead-acid battery has many cells on it to produce high voltage. I want to try this also to put many cells on my hobby project but I heard that every different metals should be separated by something. Do you know this something that separate? Any help will be greatly appreciated. Thank you.

Hello hypervalent_iodine, Thank you for response. What acids do you know more which are slightly stronger but as safer than Acetic Acid? I don't want to experiment with a corrosives ones. Thank you.

Hello hypervalent_iodine, Thank you for your quick reply. I really don't know what are galvanic cell and electrolytic. I am just a hobbyist therefore I don't know the basics of chemistry. Would you recommend me some good resource for learning chemistry? This my idea was originally came from a simple project called vinegar battery. I just like removed the contaminants of the vinegar and strengthen a bit its concentration. Any help will be greatly appreciated. Thank you.

Hello, I would like to ask if it is possible to know the exact or if not closest voltage and current that a specific acid under specific circumstances produces. For example, how much volts and amperes can a 10 milliliter 10% Acetic Acid (CH3CO2H) produce? The cathode and anode I am going to use are Copper (Cu) and Zinc (Zn) respectively. Is there any formula for this? I also heard that the two metals are the big deal here. But I'm really confused. Thank you.